<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <title>运动基础1</title>
  <style>
  #div1{
    width:200px;height:200px;background:red;position:absolute;left:0;top:50px;
  }
  </style>
   <script>
      setInterval(function(){
	    var oDiv=document.getElementById("div1");
	    oDiv.style.left=oDiv.offsetLeft+10+'px';
	  },30);
   </script>
</head>
<body>
   <div id="div1">


</body>
</html>